Sand separator



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A., G. J. RAP@ SAND sEPARATom Sheets-sheaa 1 Filed March 15 1925 Patented July 5, 1927.`

UNITED STATES AXEL G. J. RAPP, F

CHICAGO, ILLINOIS.

SAND SEPARATOR.

Application mea Marchis, 192e. serial No. 94,708.

` My invention relates to a san-d beater or separator and the process carried out thereby and has for a articular purpose to separate a volume or ow of sand or other granular or pulverized or` otherwise finely divided material. One object is the treatment of such material after it has become partly compacted or compressed or lumped, my apparatus and process serving to effect a complete io separation of the individual particles and to deliver the material entirely free from lumps or minor a'ggregations. Another object is the provision of combined beating or separating and screening means. Another object is to effect the separation and removal of particles of excess size or of lumps or aggregations which are not amenable to beating. Other objects will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawings wherein: y

Figure l is a section through one example of my invention;

Figure 2 is a similar section of a variant form of my device;

Figure 3 is a .detail plan view on an` enlarged scale of separating or screening means shown in Figure l;

Figure 4- is a section on the line 4-4 of Figure 3; and

Figure 5 is a section through a third form of my device.

Like parts are indicated by like symbols throughout the specification and drawings.

A generally indicates any suitable housing with the end wall A1, the top closure A2, the hopper end A3, the side walls A1 and the intermediate hopper wall A5.

B is any suitable drum or roller mounted on the driving shaft B1. Mounted on the shaft B1 is the sprocket B2 about which passes the drive chain B3 extending about the smaller sprocket B4 on the driven shaft B5.

C is a gear on said shaft B5 in mesh with a pinion C1 on the brush or beater shaft C2. It will be understood that the shaft B1 may be driven from any Suitable power source not herein shown, the details of which form 50 no part of the present invention. C3 is any suitable brush body or beater mounted on the shaft C2 and provided with a plurality of outwardly extending beating members or bristles C4 of any suitable metal or material. 55 The shaft C2 extends through arcuate slots A in the side walls A4 to permit adjustment of the shaft as the brush or beating member wears.

D generally indicates a comb or screen body having the forward plate D1 with the relatively sharp edge D2 closely adjacent the outer surface 0f the drum B. The comb is provided with a plurality of teeth D3 associated with the forward plate D1, the entire assemblage being connected for example by the bolt or rod D1 and the nut D5. The outer end of the teeth being supported on the adjustable brackets D6 which are slotted to take up wear on the edge D2.

E generally indicates any suitable refuse receiving member comprising the upwardly inclined portion E1 terminating adjacent the ends of thel teeth D3 and slightly below their upper level. E2 is a generally horizontal portion terminating in the upwardly recurved portion E3 exterior of the housing. The Wall A1 is cut away as at E1 to permit the passage therethrough of the material discharged across the comb and upon the receiving member.

Referring to Figure 2, in place of the comb illustrated in Figure l I employ an arcuate screening member G sepured along one face to the member G1 closely adjacent the surface of the drum B. The opposite edge is secured to the transverse member G2 at the inner edge of the collect member G3.

Referring to Figure 2, in place of the comb therein disclosed I omit the inner hopper wall A5 and substitute therefor a roller -VH yieldingly opposed to the drum B. In the variant form the driving shaft B1 is provided with a sprocket H1 about which passes a chain H2 which in turn passes about the sprocket HS on the driven shaft H4. gear H5 on such shaft meshes with the pinion C1 on the brush or beater shaft C2.

Mounted on the shaft B1 is an additional sprocket I about whii L1 passes the chain I1r which in turn passes about the sprocket I2 on the driven shaft I3. Mounted about said shaft or pivote-d concentric. with it is the arm or arms K at the/opposite end of which rotates the roller H. It is driven through the gear K3 in mesh with the'gear K4 on the shaft I3.

It will be realized that whereas I have illustrated a practical and operative device that nevertheless many changes might be made in the size, shape, numberand disposi- The 9 tion of -parts without departing from the description.

rllhe use and operatlon of my invention are as follows:

I lprovide a means for and method of breaking up finely divided material which has become compacted or lumped and which it is desired to return to its original finely divided uncompaoted condition. A practical a plication of my invention is to the recondltioning of foundry'sand, for example of sand which has been used in molding and which has in the course of its use become compacted or hardened or bonded into lumps. However I do not wish to be limited to any specific application or use since it will be realized that my method and apparatus are adaptable to a variety of uses.

In the operation of the form of my invention shown in Figure 1 the material operated upon may be poured into the hopper formed in part by the walls Al and A5, the hopper being closed at the bottom by the roll B. The roll is rotated in counter-clockwise direction at a relatively low rate and conveys the sand to the left toward the beater member. I do not wish to be limited to any particular speed of revolution but in practice the roll or drum B might rotate at the rate of 10 R. P. M. whereas the beater might be rotated at from 400 to 1000 R. P. M. As the roll relatively slowly conveys the amount of material Ltoward the beater the rapidly moving end of the individual beater members flick' against the advancing sand mass and break up and scatter the lumps and reduce the material to its original finely divided condition. The particles thus swept or beaten from the surface of the advancing mass pass between the fingers Da of the comb D'an'd are received in any suitable manner for storage, conve ing or use. The oversize particles or t elumps, if any, which resist treatment, or such large masses of metal or foreign material as may be in the mass pass over the comb and are swe t by the beater members into the member the outer edge of which E3 forms an exterior receiving pocket which may be embedded at intervals.

Referring to Figure 2 I'illustrate a variation of my device particularly adaptable to unscreened material. In the place of a comb I lemploy an arcuate screen member G through which the finely or separated material passes, while the member Gra receives the oversize.

Referrin to Figure 5 I employ in `the place of t e interior hopper wall A a weighted roll or drum H which more or less grinds or compacts the material being treated. Ifdesired the peripheral speed of rotation of the roll H may be identical with that of the roll B. However, in order to obtain a rolling or grinding action in the place of a direct compacting action, the speed of p the two drums may be varied. The'weighted dru1n,'rotated upon a`pivot arm or arms, conforms to the material passing therebeneath. In the form ,of the device shown in Figure 5 I do not'in'dicatel a comb or screen and it will be realized that in this form, as in the forms of the preceding drawings, either a comb or a screen or any other suitable separating means may be employed, or, under some circumstances, for example with the treatment of pre-screened material, screening or separating means may be eliminated and the material may be discharged directly by the beater through the open bottom of the housing.

I claim:

1. A material separatin mechanism including a beating member, feeding means for feeding the material to be separated into the path of movement of such beater, and separating means, positioned in the line of discharge of the material delivered by such beating member, adapted to separate out the oversize and discharge means, adapted to permit the 'discharge from the beating zone of such oversize material.

2. A material separating mechanism comprising a rotary beater and means for drivin it, a feed roll the diameter of which is su stantially as great as the diameter of the beater, and means for deliverin material to the upper surface of said fee roll, and means for rotating said feed roll to bring such material into the zone of rotation of such beater, the axis of the feed roll being substantially below that of .the beater, the effective zone of the beater overlying the upper conveying surface of the roll.

3. A material separating mechanism comrising a rotary beater and means for drivmg it, the beater including a plurality of relatively stiff'bristles, and means for moving generally continuously and progressively into the path of said bristles 'a body of the material toy be separated.

4. In a mechanism for separating particles of finely divided ma'c'erial, a beater and means forrotating it, said beater comprising a plurality of beater elements of relatively small cross section, means for moving into the path of said beater a generally continuous and slow moving mass of the material to be separated, the forward face of said mass beine' directlyexposed to said beater as the materlal is advanced.

5. In a mechanism for separating particles of finely divided material, a beater, and means for rotating it, means for moving into the path of said beater a generally continuous and slow moving mass of the material to be separated, the forward face of said mass being directly exposed to said beater as the material is advanced.

6. 1n a mechanism for separating particles of finely divided material, a beater and means for rotating it about a horizontal axis, a material receiving hopperV adjacent said beater, a feedroller closing the bottom of said hopper, and extending closely adjacent the path of said beater, and means for rotating said roller at a relatively slow rate of rotation, in relationto the rate ofrotation of the beater.

7. ln a mechanism for separating particles of finely divided material, a beater and means for rotating itj about a horizontal axis, a material receiving hopper adjacent said beater, ar feed roller closing the bottom of v said hopper, and extending closely adjacent the path of said beater, and means for rotating said roller at a relatively slow rate of rotation, in relation to the rate of rotation of the beater, the beater partially overlying the feed roller.

8. 1n a mechanism for separating particles of finely divided material, a beater and means for rotating it about a horizontal axis, a ymaterial receiving hopper adjacent said beater, a feeding means closing the bottom of said hopper and extending closely adjacent the path of said beater, and means for moving said feeding means forwardly to! ward said beater at a relatively low rate in relation to the lrate of movement of the beater.

9. The method of separating particles of finely divided material, which includes maintaining a relatively compacted mass of such material, conveying such material forwardly into a beating zone and flicking off from the surface of the forwardly advancing mass the individual particles to be separated.

10. The method of separating particles of finely divided material, which includes maintaining a relatively compacted mass of such material, conveying such materialforwardly lintoa beating zone and flicking off from the surface of the forwardly advancing mass the 'individual particles to be separated, and screening the oversize from the discharge so effected.

11. A/material separating .mechanism including a hopper, a closed surfaced conveying member adapted to close the bottom of said hopper, a rotary beater, positioned to overlie said conveying member and provided with a plurality of beating members of relatively small cross-section, said hopper being provided with a discharge opening adapted to permit the escape of material being fed by said feeding conveyor, the beater member being positioned adjacent said discharge opening, and means for actuating said conveying member yto convey' the material received thereon toward and through the discharge opening and into the path described by the beating member.

12. A material separating mechanisml including a hopper, a closed surfaced roll member adapted to close the bottom of said hopper, a rotary beater positioned to overlie a portion of said roll and provided with a plurality of beating members of relatively small cross-section, said hopper being provided with a discharge opening adapted to permit the escape of material being fed by said roll, the beating member being positioned adjacent said discharge opening, and means for rotating said roll to convey the material supported thereon through said aperture and into the path of rotation of the beating members.

13. A material separating mechanism including a hopper, a closed surfaced 4roll member adapted to close the bottom of said hopper, and to support the material in said hopper, a second roll member adapted to overlie said roll and to direct pressure against the material fed thereto, a rotary beater positioned adjacent said rolls and provided with a plurality of beating members of l relatively small cross-section, the beating member being positioned adjacent the area of discharge from between said rolls, and means for rotating said supporting roll and said beater member in opposition.

14. A material separating mechanism including a. material conveying closed surfaced roll, and a beater member, the diameter of the conveying roll being sufficientl great to permit the support upon said rol of a relatively large mass of finely divided material, means for rotating said beater and means for rotating said roll to bring the material supported thereupon into the path of said beater.

15. A material separating mechanism including a material conveying closed surfaced roll, and a beater member, the diameter of the conveying roll being sufficiently great to permit the support upon said roll of a relatively large mass of finely divided ma.- terial, means for rotating said beater and means for rotating said roll to bring the material supported thereupon into the path of said beater, and means for supplying to and maintaining upon the upper surface of said roll a relatively compacted mass of finely divided material.

Signed at Chicago county of Cook and State of Illinois, this 12th day of March,

AXEL G. J. RAPP. 

